1#!/bin/sh -ex
 2
 3_img_dirs="$( find . -maxdepth 1 -type d | sed -e '1d' -e 's/^\.\///' )"
 4_thumb_size="835x"
 5_thumbs_dir="thumbs"
 6_force_render=0
 7
 8usage() {
 9    echo "usage: $0 [-f|--force]"
10}
11
12[ -n "$1" ] && \
13    case $1 in
14        -f|--force)
15            _force_render=1
16            ;;
17        -h|--help)
18            usage
19            exit 0
20            ;;
21        *)
22            usage
23            exit 1
24            ;;
25    esac
26
27for dir in $_img_dirs
28do
29    cd "./$dir" || exit 1
30
31    mkdir -p "$_thumbs_dir"
32
33    _imgs="$(find . -maxdepth 1 \
34        -iname "*.jpg" -or \
35        -iname "*.jpeg" -or \
36        -iname "*.gif" -or \
37        -iname "*.png" -type f | cut -b 3-)"
38    for _img in $_imgs
39    do
40        _ext="${_img##*.}"
41        _name="${_img%%.*}"
42        _thumb="./$_thumbs_dir/${_name}_thumb.${_ext}"
43
44        [ "$_force_render" -eq 1 ] || [ ! -f "$_thumb" ] && \
45        {
46            # when compressed, gifs look ugly, so just copy them
47            # i know this is bad, but i'll adress it later
48            [ "$_ext" = "gif" ] && \
49                echo "copied $1 to $_thumb" && \
50                cp "$_img" "$_thumb" && continue
51
52            echo "creating thumbnail for $_name..."
53            convert "$_img" -resize "$_thumb_size" "$_thumb"
54        }
55    done
56
57    cd ".."
58
59done
60